Last Updated: October 6, 2025

This Privacy Policy (the “Policy”) explains how Book to Brain (“Book to Brain,” “we,” “us,” or “our”) collects, uses, shares, and protects personal information (“Personal Data”) about individuals who use our mobile app, website, and related services (collectively, the “Services”). It also describes your rights and choices regarding your Personal Data.

1. Categories of Personal Data We Collect

(a) Personal Data You Provide

• Account and Contact Information: When you create an account, we collect your name, email, password (or SSO metadata), and communication preferences.
• Uploaded Content: Pages, images, text, annotations, flashcards, or other materials you upload to the Services.
• Payment Details: Payment information is processed by our third‑party payment processor (e.g., Stripe). We receive limited billing metadata but do not store full card details.
• Feedback and Communications: Emails, surveys, or messages you send us.
• Profile Information: Your reading preferences, settings, or optional profile data.

(b) Personal Data Collected Automatically

• Device and Usage Data: Device type, operating system, browser, IP address, timestamps, and in‑app activity (e.g., scans, generations, exports).
• Cookies and Similar Technologies: We and our partners use cookies, SDKs, and similar tools for authentication, analytics, and remembering preferences. See Section 6 for cookie choices.

(c) Personal Data from Third Parties

• Single Sign‑On Providers: (e.g., Apple, Google) provide us with your name, email, and profile image when you use their login.
• Payment Processors: Share subscription status and payment confirmations.
• Service Providers: Cloud hosting, OCR/LLM/TTS providers, analytics, or crash reporting tools that process limited data on our behalf.

2. How We Use Personal Data

We process your Personal Data for the following purposes: